ScopedArgumentsTable.cpp [plain text]
#include "config.h"
#include "ScopedArgumentsTable.h"
#include "JSCJSValueInlines.h"
#include "JSObjectInlines.h"
#include "StructureInlines.h"
namespace JSC {
const ClassInfo ScopedArgumentsTable::s_info = { "ScopedArgumentsTable", nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(ScopedArgumentsTable) };
ScopedArgumentsTable::ScopedArgumentsTable(VM& vm)
: Base(vm, vm.scopedArgumentsTableStructure.get())
, m_length(0)
, m_locked(false)
{
}
ScopedArgumentsTable::~ScopedArgumentsTable()
{
}
void ScopedArgumentsTable::destroy(JSCell* cell)
{
static_cast<ScopedArgumentsTable*>(cell)->ScopedArgumentsTable::~ScopedArgumentsTable();
}
ScopedArgumentsTable* ScopedArgumentsTable::create(VM& vm)
{
ScopedArgumentsTable* result =
new (NotNull, allocateCell<ScopedArgumentsTable>(vm.heap)) ScopedArgumentsTable(vm);
result->finishCreation(vm);
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::tryCreate(VM& vm, uint32_t length)
{
void* buffer = tryAllocateCell<ScopedArgumentsTable>(vm.heap);
if (UNLIKELY(!buffer))
return nullptr;
ScopedArgumentsTable* result = new (NotNull, buffer) ScopedArgumentsTable(vm);
result->finishCreation(vm);
result->m_length = length;
result->m_arguments = ArgumentsPtr::tryCreate(length);
if (UNLIKELY(!result->m_arguments))
return nullptr;
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::tryClone(VM& vm)
{
ScopedArgumentsTable* result = tryCreate(vm, m_length);
if (UNLIKELY(!result))
return nullptr;
for (unsigned i = m_length; i--;)
result->at(i) = this->at(i);
return result;
}
ScopedArgumentsTable* ScopedArgumentsTable::trySetLength(VM& vm, uint32_t newLength)
{
if (LIKELY(!m_locked)) {
ArgumentsPtr newArguments = ArgumentsPtr::tryCreate(newLength, newLength);
if (UNLIKELY(!newArguments))
return nullptr;
for (unsigned i = std::min(m_length, newLength); i--;)
newArguments.at(i, newLength) = this->at(i);
m_length = newLength;
m_arguments = WTFMove(newArguments);
return this;
}
ScopedArgumentsTable* result = tryCreate(vm, newLength);
if (UNLIKELY(!result))
return nullptr;
for (unsigned i = std::min(m_length, newLength); i--;)
result->at(i) = this->at(i);
return result;
}
static_assert(std::is_trivially_destructible<ScopeOffset>::value, "");
ScopedArgumentsTable* ScopedArgumentsTable::trySet(VM& vm, uint32_t i, ScopeOffset value)
{
ScopedArgumentsTable* result;
if (UNLIKELY(m_locked)) {
result = tryClone(vm);
if (UNLIKELY(!result))
return nullptr;
} else
result = this;
result->at(i) = value;
return result;
}
Structure* ScopedArgumentsTable::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
}
}